Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What does organic chemistry study?

1. ACompounds based on carbon
2. BCompounds made of metals
3. COnly the noble gases
4. DOnly compounds found in plants

Which property is typical of nonmetals?

1. AThey are shiny and easily bent into wires
2. BThey are poor conductors of heat and electricity
3. CThey easily lose electrons to form positive ions
4. DThey are all solids at room temperature

Which acid is found in the stomach?

1. AAcetic acid
2. BSulfuric acid
3. CNitric acid
4. DHydrochloric acid

Hoe verandert de atoomstraal over het algemeen van links naar rechts in een periode?

1. AHij blijft precies gelijk
2. BHij neemt af
3. CHij neemt toe
4. DHij verdubbelt eerst en halveert dan

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction is at equilibrium
2. BThe reaction is endothermic
3. CThe reaction is exothermic
4. DThe reaction needs a catalyst

Why does stirring help a solid dissolve faster?

1. AIt brings fresh solvent into contact with the solid's surface
2. BIt raises the temperature of the solvent by friction a great deal
3. CIt increases the amount of solute that can dissolve in total
4. DIt turns the solid into a liquid

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe reaction becomes endothermic
2. BThe products end up at a lower energy, so more heat is released
3. CThe peak is lower, but the energy of reactants and products stays the same
4. DThe reactants start at a higher energy

Marble chips react with hydrochloric acid, giving off CO₂. The gas is produced quickly at first, then more and more slowly. Why does the rate fall?

1. AThe CO₂ produced turns back into acid
2. BThe acid concentration falls as it is used up, so collisions become less frequent
3. CThe products act as a catalyst that slows the reaction down
4. DThe activation energy steadily increases as the reaction goes on